Means for guiding the jacks in crompton dobby-looms.



PATENTED APR. 26, 1904.

G. SGHWABE. MEANS FOR GUIDING THE JAGKS IN GROMPTON'DOBBY LO 0MS1 APPLIOATIOIT FILED OUT. 22, 1903..

H0 MODEL.

ms mums PETERS co mm'oumo, wnwmc'rcn. n, 04

Patented April 26, 1904.

PATENT O FICE.

GEORG SGHIVABE, OF BIELITZ, AUSTRIA-HUNGARY.

MEANS FOR GUIDING THE JACKS IN CROIVIPTON DOBBY-LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 758,219, dated April 26, 1904.

Application filed October 22, 1903; Serial No. 178,069. (No model.) 7

To all whom it may concern.-

Be it known that I, Gnone SCHWABE, a citizen of Austria-Hungary, and a resident of Bielitz, Austria-Hungary, have invented new and Improved Means for Guiding the Jacks in (lrornpton Dobby-Looms, of which the following is a specification.

The operating-jacks of the heddle-frames in Urompton dobby-looms present various inconvenlences as regards the guiding means now employed with such looms. The jacks as heretofore constructed are journaled in lateral recesses of the levers operating the heddleframes and are guided on one side of the same along the lever, while on the other side the guide for the jack is formed by the 'adjoining lever. This, however, is not a suflicient means for guiding the jack, inasmuch as when the shed is opened the jack will become disengaged from the adjoining l'ever, Fig. 2. In order to avoid this inconvenience as much as possible, the operating-jacks are pivoted to the angular projection of this lever in such a manner that this jack is kept under a certain tension. However, the friction caused thereby makes it necessary to increase the weight of the jacks in order to enable them to engage in front of the knives in due time. Furthermore, this means of attachment is the cause of frequent defects in the fabrics during the weaving operation. The increased weight of the jacks exerts an undue pressure upon the roller pattern-chain, and, furthermore, the tension due to the riveting of the pivot of the jack slackens after a short time, whereby the pointed end of the jack, which has now become loose, deviates laterally, as the adjoining lever does not afford a satisfactory guide any longer, the jack becoming entangled with the adjoining lever, so as to cause rupture of the jack or of the heddlaframe-operating lever. The present invention intends to overcome all these drawbacks.

In the accompanying drawings, Figure 1 is a side viewof part of a loom embodying my invention; Fig. 2, a similar view showing the parts in different position; Fig. 3, a front view, partly in section, thereof; and Fig. 4, aplan, partly in section.

The letter 0Z represents the jack, and a the heddle-frame lever, having an integral arm f. This arm has a forked rear end g, which embraces the rear end of jack (2. The jack is freely movable on a bolt 2 passing through the fork g. The operating-jack is also guided in a suitable aperture or slot it, provided in the heddle-frame-operating lever a, Figs. 3 and 4, which surrounds the jack and allows the jack to be lifted ordropped without impediment between the side walls it of the aperture. The jacks are thereby entirely surrounded by the lever a at their fulcrum a, as well as at their forward end. The jacks are therefore free to drop without impediment or friction, though they may be made of light weight. They are entirely separated from the adjoining lever, and crowding of the jack against the latter is not possible, so that irregularities in the lifting of the heddles during the weaving operation are avoided. The jacks are securely guided in the slots (forks g and side walls it) of the heddle-frame-operating lever c; and are perfectly secured against rupture. The unimpeded free downward movement of the jacks d results in their pointed ends 6 engaging at the right moment in front of the knife 0 even when the loom is running at a high speed, and the small weightof the jacks effects a great saving in the material for pattern-chain.

hat I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. In a loom, a heddle-frame lever having an arm and a slot, combined with a jack pivoted to the arm and engaging the slot, substantially as specified.

. 2. In aloom, a slotted lever having a forked arm, combined with a jack pivoted. to said arm and engaging the lever-slot, substantially as specified.

In witness whereof'I have hereunto signed my name in the presence. of two subscribing witnesses.

Y enone SCHWABE.

Witnesses ANTON BUDZIKIEWICZ, CARL SCHMIDT. 

